SUSY under siege from direct and indirect WIMP detection experiments

TL;DR

This paper evaluates the current and future prospects of detecting supersymmetric WIMP dark matter, showing many models are now ruled out by recent experiments, but some remain viable for future detection efforts.

Contribution

It provides a comprehensive analysis of multiple supersymmetric dark matter scenarios in light of recent experimental constraints and projections for upcoming detection experiments.

Findings

Many supersymmetric WIMP models are now excluded by recent direct detection limits.

Certain natural SUSY models with axions remain viable due to depleted local WIMP abundance.

Future ton-scale detectors could confirm or exclude remaining WIMP parameter space.

Abstract

We examine updated prospects for detecting WIMPs in supersymmetric models via direct and indirect dark matter search experiments. We examine several historical and also still viable scenarios: projections for well-tempered neutralinos (WTN), projections from the MasterCode (MC), BayesFits (BF) and Fittino (FO) collaborations, non-thermal wino dark matter (NThW) and finally mixed axion-higgsino dark matter from SUSY with radiatively-driven naturalness (RNS). The WTN is ruled out by recent limits from XENON and LUX collaborations. The NThW scenario, previously on tenuous ground due to gamma-line searches, appears also ruled out by recent combined Fermi-LAT/MAGIC limits combined with new HESS results from continuum gamma rays. Substantial portions of MC parameter space and 1 TeV higgsino parameter space from BF group are ruled out. The 100-300 GeV higgsino-like WIMP from RNS survives due to its possible depleted local abundance (where the axion may make up the bulk of dark matter). Projections from ton-scale noble liquid detectors should discover or rule out WIMPs from the remaining parameter space of these surviving models.